1.4. Table 2 illustrates proposed schedule for the design phase of the project.

Table 2: The label, description, duration and predecessor(s) of activities that inform the database design. Activity label Activity description Predecessor Optimistic (a) Most likely (m) Pessimistic (b) A Analyse architecture design model - 2.2 3 3.5 B Create conceptual design A 5 6 6.5 C Create logical design B 8.5 9 9.5 D Assess database management systems and skills B 1 3 4 E Assess server-side scripting languages and skills B 1 2.5 3 F Select language and assign programmers E 1 2.5 3 G Select database management system and assign programmers D 1 2.5 3 H Create physical database system C, H, G 66 66.5 67

1.4.1.Calculate the expected duration (te) for activity A. (1)

1.4.2.Calculate the expected duration (te) for activity B. (1)

1.4.3.Calculate the expected duration (te) for activity C

1.4.4.Calculate the expected duration (te) for activity D. (1)

1.4.5.Calculate the expected duration (te) for activity H.